docs: def dasopw(fname):
      """
      Open a DAS file for writing.
      
      https://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/dasopw_c.html
      :param fname: Name of a DAS file to be opened. 
      :type fname: str
      :return: Handle assigned to the opened DAS file.
      """
      fname = stypes.stringToCharP(fname)
      handle = ctypes.c_int(0)
      libspice.dasopw_c(fname, ctypes.byref(handle))
      return handle.value